src/selcodepage.c

   1 /*
   2    User interface for charset selection.
   3
   4    Copyright (C) 2001 Walery Studennikov <despair@sama.ru>
   5
   6    Copyright (C) 2011-2024
   7    Free Software Foundation, Inc.
   8
   9    Written by:
  10    Walery Studennikov <despair@sama.ru>, 2001
  11
  12    This file is part of the Midnight Commander.
  13
  14    The Midnight Commander is free software: you can redistribute it
  15    and/or modify it under the terms of the GNU General Public License as
  16    published by the Free Software Foundation, either version 3 of the License,
  17    or (at your option) any later version.
  18
  19    The Midnight Commander is distributed in the hope that it will be useful,
  20    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22    GNU General Public License for more details.
  23
  24    You should have received a copy of the GNU General Public License
  25    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  26  */
  27
  28 /** \file selcodepage.c
  29  *  \brief Source: user %interface for charset %selection
  30  */
  31
  32 #include <config.h>
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36
  37 #include "lib/global.h"
  38 #include "lib/widget.h"
  39 #include "lib/charsets.h"
  40
  41 #include "setup.h"
  42
  43 #include "selcodepage.h"
  44
  45 /*** global variables ****************************************************************************/
  46
  47 /*** file scope macro definitions ****************************************************************/
  48
  49 #define ENTRY_LEN 30
  50
  51 /*** file scope type declarations ****************************************************************/
  52
  53 /*** forward declarations (file scope functions) *************************************************/
  54
  55 /*** file scope variables ************************************************************************/
  56
  57 /* --------------------------------------------------------------------------------------------- */
  58 /*** file scope functions ************************************************************************/
  59 /* --------------------------------------------------------------------------------------------- */
  60
  61 static unsigned char
  62 get_hotkey (int n)
  63 {
  64     return (n <= 9) ? '0' + n : 'a' + n - 10;
  65 }
  66
  67 /* --------------------------------------------------------------------------------------------- */
  68 /*** public functions ****************************************************************************/
  69 /* --------------------------------------------------------------------------------------------- */
  70
  71 /* Return value:
  72  *   -2 (SELECT_CHARSET_CANCEL)       : Cancel
  73  *   -1 (SELECT_CHARSET_OTHER_8BIT)   : "Other 8 bit"    if seldisplay == TRUE
  74  *   -1 (SELECT_CHARSET_NO_TRANSLATE) : "No translation" if seldisplay == FALSE
  75  *   >= 0                             : charset number
  76  */
  77 int
  78 select_charset (int center_y, int center_x, int current_charset, gboolean seldisplay)
  79 {
  80     Listbox *listbox;
  81     size_t i;
  82     int listbox_result;
  83     char buffer[255];
  84
  85     /* Create listbox */
  86     listbox =
  87         listbox_window_centered_new (center_y, center_x, codepages->len + 1, ENTRY_LEN + 2,
  88                                      _("Choose codepage"), "[Codepages Translation]");
  89
  90     if (!seldisplay)
  91         LISTBOX_APPEND_TEXT (listbox, '-', _("-  < No translation >"), NULL, FALSE);
  92
  93     /* insert all the items found */
  94     for (i = 0; i < codepages->len; i++)
  95     {
  96         const char *name = ((codepage_desc *) g_ptr_array_index (codepages, i))->name;
  97         g_snprintf (buffer, sizeof (buffer), "%c  %s", get_hotkey (i), name);
  98         LISTBOX_APPEND_TEXT (listbox, get_hotkey (i), buffer, NULL, FALSE);
  99     }
 100     if (seldisplay)
 101     {
 102         unsigned char hotkey = get_hotkey (codepages->len);
 103         g_snprintf (buffer, sizeof (buffer), "%c  %s", hotkey, _("Other 8 bit"));
 104         LISTBOX_APPEND_TEXT (listbox, hotkey, buffer, NULL, FALSE);
 105     }
 106
 107     /* Select the default entry */
 108     i = (seldisplay)
 109         ? ((current_charset < 0) ? codepages->len : (size_t) current_charset)
 110         : ((size_t) current_charset + 1);
 111
 112     listbox_set_current (listbox->list, i);
 113
 114     listbox_result = listbox_run (listbox);
 115
 116     if (listbox_result < 0)
 117     {
 118         /* Cancel dialog */
 119         return SELECT_CHARSET_CANCEL;
 120     }
 121     else
 122     {
 123         /* some charset has been selected */
 124         if (seldisplay)
 125         {
 126             /* charset list is finished with "Other 8 bit" item */
 127             return (listbox_result >= (int) codepages->len)
 128                 ? SELECT_CHARSET_OTHER_8BIT : listbox_result;
 129         }
 130         else
 131         {
 132             /* charset list is began with "-  < No translation >" item */
 133             return (listbox_result - 1);
 134         }
 135     }
 136 }
 137
 138 /* --------------------------------------------------------------------------------------------- */
 139
 140 /** Set codepage */
 141 gboolean
 142 do_set_codepage (int codepage)
 143 {
 144     char *errmsg;
 145     gboolean ret;
 146
 147     mc_global.source_codepage = codepage;
 148     errmsg = init_translation_table (codepage == SELECT_CHARSET_NO_TRANSLATE ?
 149                                      mc_global.display_codepage : mc_global.source_codepage,
 150                                      mc_global.display_codepage);
 151     ret = errmsg == NULL;
 152
 153     if (!ret)
 154     {
 155         message (D_ERROR, MSG_ERROR, "%s", errmsg);
 156         g_free (errmsg);
 157     }
 158
 159     return ret;
 160 }
 161
 162 /* --------------------------------------------------------------------------------------------- */
 163
 164 /** Show menu selecting codepage */
 165 gboolean
 166 do_select_codepage (void)
 167 {
 168     int r;
 169
 170     r = select_charset (-1, -1, default_source_codepage, FALSE);
 171     if (r == SELECT_CHARSET_CANCEL)
 172         return FALSE;
 173
 174     default_source_codepage = r;
 175     return do_set_codepage (default_source_codepage);
 176 }
 177
 178 /* --------------------------------------------------------------------------------------------- */